Wall-molding apparatus.



G. W. HADDEN.

WALL MOLDING APPARATUS.

APPLICATION FILED SEPT.22, 1914.

1,162,91 3.. Patented Dec. 7, 1915.

WITNESSES. IN VENTOR G807? Wffadden.

A TTORNEY entrain sra'rns rarnn' orrn GEORGE W. I-IADDEN, OF KANSAS CITY, MISSOURI.

WALL-MOLDING- APPARATUS.

Specification of Letters Patent.

Patented Dec. *7, 1%15.

Application filed September 22, 1914. Serial No. 862,885. 7

i it appertains to make and use the same.

The invention relates to lifting jacks for wall forms and seeks to provide a simple and eflicient form of lifting jack whichmay be secured to the wall form and lifted simultaneously with the formvas the form is raised after the completion of additional layer of wall. 7

Walls are constructed by setting forms and filling them with concrete and other material, raising the form for each additional layer after the completion of the one in the form. It is essential that lifting jacks for wall forms be constructed light of weight owing to the necessity of transportation 1 i from place to which they must be carried'tocomplete the mayv easily and quickly lift the form fro-m the finished secplace and to the height to wall, and also that they tion of the wall to that which is to be built.

The'present invention seeks to provide an improved lifting jack. which is directly mounted on the form, is light of weight and may easily be carried to extreme heights as the wall is built and as easily lowered to the ground after the wall is completed,

together with a powerful leverageto promote ease in lifting the form, and an auto matic gripping means whereby the jack and form 18 lifted from successive grips and the reinforcing rod which is allowed to remain in the wall.

With these and other objects in view, the invention consists in the features of construction, combinations and arrangements of the parts hereinafter set forth, illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings: Figure 1 is a view in elevation of the improved jack connected to a form and illustrating a fragmentary section of wall to show the application. Fig. 2 is a plan view of the jack and a fragment of wall upon which the jack and form are mounted. Fig. 3 is a view in section of certain parts of the operating mechanism taken on line a-a of Fig. 1. Fig. 4 is a fragmentary View illustrating the means that grip the reinforcing rod.

The forms 1 and 2 are of usual construction and as shown are circular horizontally, such as are used for the construction of large grain tanks and the like. It is obvious however that other forms may be used and it is not desired to confine the invention to the uses of circular form's.

To the forms 1 and 2 are secured posts 3 in any convenient manner, the means of connection being no part of the invention, the

posts having secured to the upper end there-v of the longitudinal members 1 and cross member 5 which serve as a means of fixing the upper end of the posts in relative position, and also as a means of securing the lifting members of the jack to' the posts. ross members 6 are secured to longitudinal members i and have pivoted to their centers at 7 the upper ends of the toggle joint legs 8 and 9 which are preferably formed in channel shape, while to the lower end of the legs 8 and 9 at l2and 18 respectively are pivoted the upper ends of the toggle legs 10 and 11 respectively, the lower ends of the latter legs being pivoted at 14: to the collar 23. 7

A suitable member is pivoted between the legs 9 and 11 at 13 comprising three bearing boxes 15, the outer boxes carry one end of the screw threaded shafts 16 with pinions 17 secured 011 the outer ends thereof, collars 718 being secured to the shafts adjacent the inner ends of the bearings while the center bearing carries a 7 short shaft 19 to the outer end of which is secured the boss 20 of the hand wheel 21, the inner end of the shaft 19 being held from endwise movement by collar 20. A suitable member comprising two screw threaded bearing boxes 22 is pivoted between the legs 8 and 10 at 12, the shafts 16 being screw threaded and resting therein and engaging with the boxes so that as the screws are turned the boxes 22 and 15 may draw closer together or spread farther apart;

A suitable member 23 is pivoted between the legs 10 and the legs 12 and pivoted at 1 1, a vertical hole in the center of the member forming a ring so that it will pass over the reinforcing rod 2 1 and engage with the clamping jaws 25, the upper side of this ring being smaller internally than the lower inside and tapering on the inside thereof, this taper corresponding to the taper of the jaw 25. The jaws 25 are constructed round horizontally, the lower end 29 there of be ng larger in clrcumference than the 7 upper end at 26 and the outside tapering.

upward to 26, the inside part of the jaws having teeth out therein so that they may grip a rod when forced against it. The outside end of the jaws enlarge in diameter upwardly from thepoint 2 6 andbeing of a shorter length, the inside is also shaped to,

turn outwardly so that when the ring 23 is drawn up against jaws the lower ends thereof will turn out- Ward-, thereby releasing their grip on the rod as shown dotted lines in Fig 1'.

To the hand wheel is secured airinternal gear'SSprefera-bly formed integral bearing boxes therewith, the gears 1 7- secured on the ends of the shafts 16 engaging with: the internal gear 28'. When the hand wlieel 2 1 isturned in one? direction the pivots 19 and 13 are spread apart by means ofthe gears and screw shafts l6 engaging with the threaded I thereby causing the pivot end 1 4 to rise, the ring 23 releasing the, jawsi25 an-d raising said jaws to a higher position, then by turning the hand wheel in the opposite direction the ring 23 will prevent them from spreading and are used to grip the forms on a section of wall that is finished while the aws 29 are being raised to a new position on the'rod' 24:.

aim, 7' r 1. In a Wall molding apparatus, a frame, a wall form secured to said frame, said frame projecting upward from saida form,

the upper ends of the.

members holding the upper end of said frame in relative position, upper toggle lint legs pivoted to and depending from rid members, lower toggle joint legs pivoted to said upper legs, a ring pivoted to said lower toggle joint legs, gripping jaws in said ring, and means to spread and retract said toggle joint legs whereby said jaws are raised and lowered, being forced to grip a reinforcing rod in their downward movement and released" from said rod in their upward movement, said frame and'said form being lifted upon further retraction of'said legs.

2. In a wall molding apparatus the combination of a form, a frame rising from said form, toggle joint legs pivoted to and depending within said frame, screws mounted in members piioted to said legs, means to turn screws in unison whereby the lower end of said legs are raised and lowered, a. ring pivoted to the lower end of said legs and; a set of jaws in said ring constructed to grip a rod'positioned within said frame whereby. said frame and said form are raised as said legs are retrzcted and said jaws released from said rod while said legs are being spread.

3, In a, wall molding apparatus the combination of, a form, a frame rising from said form, toggle joint legs pivoted to said frame, toggle oint legs pivoted to said first mentioned'toggle joint legs, means connected to the bottom of said last mentioned toggle joint legs to grip, and release a reinforcing rod andmeans to expand and retract said toggle joint legs whereby said form may be raised;-

In testimony whereof: I aflix my signature in the presence of two witnesses.

GEORGE W. HADDEN. Htnesse's:

J", C; KLAssER, H. I]. HARRISON.

Copies of this patent may he obtained'fo r five cents each, by addressing the Commissioner of Patents,

\ I Washington, D. 0} r V 

